As Martin has mentioned, if you use an MCU or TelePresence Server, you can mute the incoming video of the TCS.
This has even been asked before a couple of times, and there are even 2 enhancement requests for it, CSCty83791 and CSCup47470. If this is something you really like to see, suggest you contact your Cisco Account Manager and see if they can push either of those requests for you.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.